Usmanov, 62, recently paid £146m to his business partner Farhad Moshiri (qv) for his 15% stake in Arsenal. He now owns 30% of the Premier League football club, making him the second-biggest shareholder behind the US billionaire Stan Kroenke. Usmanov made his money through steel and iron ore mines. He burnished his reputation in 2014 when he bought James Watson's Nobel prize for his work on DNA at auction and then gave it back to the famous biologist, a gesture that cost him $4.8m. "Dr Watson's work contributed to cancer research, the illness from which my father died," he said. Usmanov's company assets have fallen in value to £3.67bn. He owns Sutton Place, the Surrey manor house once owned by J Paul Getty, the grandfather of Mark Getty (qv). Usmanov met his wife, the gymnastics coach Irina Viner, at a Tashkent sports club. They married in 1992. He donated more than £100m to worthy causes in the past year.